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' 19 September 2001 <br /> AGE-NC Project No 96-0254 <br /> Page 4 of 4 <br /> maximum contaminant level (MCL) of 1 µg/1 in samples collected from both wells A low <br /> concentration ofMTBE was detected in the ground water sample collected from MW-4 The <br /> MTBE concentration did not exceed the State of California primary maximum contaminant <br /> level (MCL) of 13 ppb In general, overall hydrocarbon concentrations have decreased this <br /> quarter Isocontour maps illustrating the approximate distribution of dissolved TPH-g, <br /> benzene and MTBE in the shallow screened wells are presented in Figures 4, 5, and 6 <br />' 5.0. RECOMMENDATIONS <br /> Based on the results of this investigation, AGE recommends continued quarterly monitoring The <br /> next monitoring event should be scheduled for October 2001 <br />' 6.0. LINIITATIONS <br /> • Our professional services were performed using that degree of care and skill ordinarily exercised by <br /> environmental consultants practicing in this or similar localities The findings were based mainly <br /> upon analytical results provided by an independent laboratory Evaluation of the <br /> geologic/hydrogeologic conditions at the site for the purpose of this investigation are made from a <br /> limited number of available data points(i a monitoring well ground water samples),and subsurface <br /> conditions may vary away from these data points No other warranty,expressed or implied, is made <br /> as to the professional recommendations contained in this report <br /> I <br /> I <br /> • <br /> Advanced GecEnvnronmental Inc <br />